TONIGHT/SUNDAY
Drizzle and light rain will stay mainly north of I-64 overnight and into tomorrow morning. However, I can’t completely rule out a stray shower or some mist for communities farther south. An isolated shower will be possible for tomorrow afternoon as the core of the storm system passes overhead. Winds will also strengthen from the north 10 to 20 mph.
Saturday, October 17, 2009
Friday, October 16, 2009
Extended Winter Outlook: CPC
Yesterday we talked about the late Fall-early Winter outlook for temperature and precipitation. Today, we'll look at the extended Winter outlook, also issued by the Climate Prediction Center (CPC).
(Images: NOAA)
As explained previously, these outlooks are primarily based on the El Nino-Southern Oscillation trend, which is currently in El Nino. These long-range Winter outlooks, which cover the Winter months (December into March), are related to the North American weather trends that tend to result from the equatorial Pacific waters being warmer-than-average. The warmer waters alter the tropical rain patterns, with a domino effect into the jet stream pattern over the Pacific into North America. When the jetstream shifts, that also shifts the track low-pressure systems take, making some regions drier than average, while others can expect a wetter Winter than average. With the jet hugging the southern parts of the U.S., this should bring more precipitation to that region. It will also result in cooler conditions for the Southeast into the Mid-Atlantic. This long-range outlook coincides with the three-month outlook we talked about yesterday, supporting the expected continuation of the El Nino trend. For Virginia, this could mean a wetter, cooler Winter, which would thus mean the potential for more winter weather events (translated: kids, that means maybe more snow days!). Look for Chief Meteorologist Zach Daniel's Snow Outlook to be released in early December.
(Images: NOAA)
As explained previously, these outlooks are primarily based on the El Nino-Southern Oscillation trend, which is currently in El Nino. These long-range Winter outlooks, which cover the Winter months (December into March), are related to the North American weather trends that tend to result from the equatorial Pacific waters being warmer-than-average. The warmer waters alter the tropical rain patterns, with a domino effect into the jet stream pattern over the Pacific into North America. When the jetstream shifts, that also shifts the track low-pressure systems take, making some regions drier than average, while others can expect a wetter Winter than average. With the jet hugging the southern parts of the U.S., this should bring more precipitation to that region. It will also result in cooler conditions for the Southeast into the Mid-Atlantic. This long-range outlook coincides with the three-month outlook we talked about yesterday, supporting the expected continuation of the El Nino trend. For Virginia, this could mean a wetter, cooler Winter, which would thus mean the potential for more winter weather events (translated: kids, that means maybe more snow days!). Look for Chief Meteorologist Zach Daniel's Snow Outlook to be released in early December.
Thursday, October 15, 2009
Double Dip of Record Cold Highs
The high temperature for Thursday of 54 degrees set a new record for the coldest low, or what is called a record low maximum. The old record low maximum was 56 set in 1939. It's very likely that tomorrow's high will set another record, making it back-to-back record-setting days. The record low maximum for tomorrow is 54 set in 1940, and we are forecasting a high of just 49. Those 70s next week can't get here too soon.
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